下列代码输出为():classFather{publicvoidF(){Console.Write("A.F");}publicvirtualvoidG(){Console.Write("A.G");}}classSon:Father{newpublicvoidF(){Console.Write("B.F");}publicoverridevoidG(){Console.Write("B.G");}}classoverride_new{staticvoidMain(){Sonb=newSon();Fathera=b;a.F();b.F();a.G();b.G();}}